Ok, so I'm no fix-it-all repair guy, but being an engineer, I can usually make stuff work.
My wife complains that the dryer is not getting the clothes dry very fast anymore. She further complains that the "Intellidry" function is not working properly. She claims the unit turns off prior to the clothes actually drying.
First things first, I clean out all the lint. Truth be told, I do this every once in a while anyway, and this was not a problem. I double check flow through the 4 inch duct, no issues. The line to the outside is A-OK and unobstructed.
I think to myself: "Ok, how hard could this be? Faulty sensor? Bad/open coil?"
I open the unit and quickly find a single heating coil element with 4 "sections" and a heat element thermostat mounted on top of it.
After some playing around, I try to eliminate the thermostat as a problem by unscrewing it, and physically removing the element from the heating coil so that heating coil operation will not change the sensing. This causes the heating element to go super HOT, so I turn it off before it blows or melts or whatever. I deduct the coil is WORKING, and seemingly, working properly.
Next, I deduct that the thermo fuses are intact, otherwise, the element would not heat at all.
I further deduct the problem is a faulty thermostat. I go online, order a kit with identical parts, receive it today, and install it. NO CHANGE.
The unit still spins, the unit still heats, but the unit takes 3-4 times longer to dry clothes. The outgoing air flow is warm, but not HOT. I have read somewhere outgoing flow should be roughly between 120F-160F. I think the outgoing heated air is struggling to reach 100F.
The "Intellidry" function(s) have not been tested. I figure this must be some type of humidity tester which is not being tripped due to low heat causing low evaporation. *shrug* Perhaps, this faulty sensor is causing the unit to lower heat? I doubt it, since this feature turns the machine OFF, not DOWN, right?